- Treatment outcomes for substance abuse are improved by regular attendance at counseling sessions, and attending at counseling sessions can be futher improved by prize-based incentives. However, a system of prize-based incentives can be difficult to administer without computerization for accurate recordkeeping and rapid calculation of earnings. NIDA researchers have developed the eXtensible Platform for Motivational Incentives (XPMI), a computer program that for reinforcement of weekly counseling attendance. Users are eligible to win prizes through automated draws. The researchers are interested in testing the effectiveness and ease of use of the XPMI software so it can ultimately be run by staff in community treatment programs.